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Anthropic Accuses Alibaba of Claude AI Theft, Blocks Access

7/8/2026

Summary

Story summary

Anthropic accused Alibaba of copying its Claude AI model via a distillation attack.
In a June 10 letter to Senators Elizabeth Warren and Tim Scott, Anthropic said Alibaba used accounts to generate millions of Claude interactions.
Anthropic briefly deployed hidden code to flag China-based users but withdrew it over privacy concerns, warning that such attacks threaten national security.
Alibaba will block employees from using Anthropic’s AI tools for work starting Friday.

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Story summary

Anthropic accused Alibaba of copying its Claude AI model via a distillation attack.
In a June 10 letter to Senators Elizabeth Warren and Tim Scott, Anthropic said Alibaba used accounts to generate millions of Claude interactions.
Anthropic briefly deployed hidden code to flag China-based users but withdrew it over privacy concerns, warning that such attacks threaten national security.
Alibaba will block employees from using Anthropic’s AI tools for work starting Friday.